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Subject[PATCH] xhci-pci: Set AMD Renoir USB controller to D3 when shutdown
Date
On AMD Renoir/Cezanne platforms, when set "Always on USB" to "On" in BIOS,
USB controller will consume more power than 0.03w.

Set it to D3cold when shutdown, S5 power consumption will be 0.03w lower.
The USB can charge other devices as before.
USB controller works fine after power on and reboot.

Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
---
drivers/usb/host/xhci-pci.c | 8 ++++++++
drivers/usb/host/xhci.h | 1 +
2 files changed, 9 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 84da8406d5b4..a31be1ba927f 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -62,6 +62,7 @@
#define PCI_DEVICE_ID_AMD_PROMONTORYA_3 0x43ba
#define PCI_DEVICE_ID_AMD_PROMONTORYA_2 0x43bb
#define PCI_DEVICE_ID_AMD_PROMONTORYA_1 0x43bc
+#define PCI_DEVICE_ID_AMD_RENOIR_USB31 0x1639
#define PCI_DEVICE_ID_ASMEDIA_1042_XHCI 0x1042
#define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI 0x1142
#define PCI_DEVICE_ID_ASMEDIA_1142_XHCI 0x1242
@@ -171,6 +172,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
if (pdev->vendor == PCI_VENDOR_ID_AMD)
xhci->quirks |= XHCI_TRUST_TX_LENGTH;

+ if (pdev->vendor == PCI_VENDOR_ID_AMD &&
+ pdev->device == PCI_DEVICE_ID_AMD_RENOIR_USB31)
+ xhci->quirks |= XHCI_SHUTDOWN_D3COLD;
+
if ((pdev->vendor == PCI_VENDOR_ID_AMD) &&
((pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4) ||
(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_3) ||
@@ -594,6 +599,9 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
/* Yet another workaround for spurious wakeups at shutdown with HSW */
if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
pci_set_power_state(pdev, PCI_D3hot);
+
+ if (xhci->quirks & XHCI_SHUTDOWN_D3COLD)
+ pci_set_power_state(pdev, PCI_D3cold);
}
#endif /* CONFIG_PM */

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 25e57bc9c3cc..0684193da4bd 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1883,6 +1883,7 @@ struct xhci_hcd {
#define XHCI_SKIP_PHY_INIT BIT_ULL(37)
#define XHCI_DISABLE_SPARSE BIT_ULL(38)
#define XHCI_SG_TRB_CACHE_SIZE_QUIRK BIT_ULL(39)
+#define XHCI_SHUTDOWN_D3COLD BIT_ULL(40)

unsigned int num_active_eps;
unsigned int limit_active_eps;
--
2.30.0
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